Westlake Corporation (WLK) - Market capitalization

Market cap: C$12.35 Billion

As of September 2026 Westlake Corporation has a market cap of C$12.35 Billion. This makes Westlake Corporation the world's 2223th most valuable company by market cap according to our data. The market capitalization, commonly called market cap, is the total market value of a publicly traded company's outstanding shares and is commonly used to measure how much a company is worth.

Market cap history of Westlake Corporation from 2004 to 2026

End of year Market Cap

Year	Marketcap	Change
2026	C$12.35 B	-4.66%
2025	C$12.95 B	-38.62%
2024	C$21.10 B	-11.27%
2023	C$23.78 B	34.05%
2022	C$17.74 B	12.15%
2021	C$15.82 B	19.07%
2020	C$13.28 B	12.98%
2019	C$11.76 B	1.58%
2018	C$11.57 B	-33.03%
2017	C$17.29 B	78.29%
2016	C$9.69 B	-1.16%
2015	C$9.81 B	4.15%
2014	C$9.42 B	8.76%
2013	C$8.66 B	64.2%
2012	C$5.27 B	93.52%
2011	C$2.72 B	-5.31%
2010	C$2.87 B	66.34%
2009	C$1.73 B	33.09%
2008	C$1.30 B	4.82%
2007	C$1.24 B	-47.97%
2006	C$2.38 B	9.17%
2005	C$2.18 B	-16.1%
2004	C$2.60 B

End of Day market cap according to different sources

On Sep 17th, 2026 the market cap of Westlake Corporation was reported to be:

C$12.61 Billion

by Nasdaq

C$12.62 Billion

by CompaniesMarketCap

Market capitalization for similar companies or competitors

Name	Marketcap	Market cap differencediff.	Country
Albemarle ALB	C$18.31 B	48.27%	🇺🇸 USA
Celanese CE	C$6.97 B	-43.54%	🇺🇸 USA
Dow DOW	C$29.04 B	135.11%	🇺🇸 USA
Eastman Chemical EMN	C$10.50 B	-14.92%	🇺🇸 USA
Phillips 66 PSX	C$153.24 B	1,140.61%	🇺🇸 USA
Exxon Mobil XOM	C$941.02 B	7,518.32%	🇺🇸 USA
Honeywell HON	C$91.56 B	641.32%	🇺🇸 USA
Olin Corporation OLN	C$2.68 B	-78.25%	🇺🇸 USA
Huntsman Corporation HUN	C$2.23 B	-81.94%	🇺🇸 USA

What is the market capitalization of a company?

The market capitalization sometimes referred as Marketcap, is the value of a publicly listed company.
In most cases it can be easily calculated by multiplying the share price with the amount of outstanding shares.

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Market capitalization of Westlake Corporation (WLK)

Market cap: C$12.35 Billion